The polyphagous shot-hole borer (PSHB) is a tiny but devastating invasive beetle that poses a major threat to urban forests and natural ecosystems. First detected in California in 2003 and more recently in Western Australia, PSHB carries a fungal pathogen that disrupts water and nutrient flow in trees, leading to branch dieback and, in severe cases, tree death.

Join us for this insightful webinar as Dr. Shannon Lynch share lessons learned from decades of PSHB management in California—including surveillance, host tree impacts, and community engagement strategies—and how these experiences are shaping Western Australia’s response to this emerging threat.